222191916 has 12 divisors (see below), whose sum is σ = 518447832. Its totient is φ = 74063968.

The previous prime is 222191903. The next prime is 222191923. The reversal of 222191916 is 619191222.

222191916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9257985 + ... + 9258008.

It is an arithmetic number, because the mean of its divisors is an integer number (43203986).

Almost surely, 2^222191916 is an apocalyptic number.

It is an amenable number.

222191916 is an abundant number, since it is smaller than the sum of its proper divisors (296255916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222191916 is a wasteful number, since it uses less digits than its factorization.

222191916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18516000 (or 18515998 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 222191916 is about 14906.1033137437. The cubic root of 222191916 is about 605.6793279953.

The spelling of 222191916 in words is "two hundred twenty-two million, one hundred ninety-one thousand, nine hundred sixteen".